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[wpimath] Add cosineScale method to SwerveModuleState and instance optimize (#7114)

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This commit is contained in:
Nicholas Armstrong
2024-09-30 15:23:30 -04:00
committed by GitHub
parent fde264b041
commit fe80d72fba
13 changed files with 311 additions and 64 deletions
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13
wpilibcExamples/src/main/cpp/examples/SwerveControllerCommand/cpp/subsystems/SwerveModule.cpp
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@@ -53,27 +53,26 @@ frc::SwerveModulePosition SwerveModule::GetPosition() {
units::radian_t{m_turningEncoder.GetDistance()}};
}
void SwerveModule::SetDesiredState(
const frc::SwerveModuleState& referenceState) {
void SwerveModule::SetDesiredState(frc::SwerveModuleState& referenceState) {
frc::Rotation2d encoderRotation{
units::radian_t{m_turningEncoder.GetDistance()}};
// Optimize the reference state to avoid spinning further than 90 degrees
auto state =
frc::SwerveModuleState::Optimize(referenceState, encoderRotation);
referenceState.Optimize(encoderRotation);
// Scale speed by cosine of angle error. This scales down movement
// perpendicular to the desired direction of travel that can occur when
// modules change directions. This results in smoother driving.
state.speed *= (state.angle - encoderRotation).Cos();
referenceState.CosineScale(encoderRotation);
// Calculate the drive output from the drive PID controller.
const auto driveOutput = m_drivePIDController.Calculate(
m_driveEncoder.GetRate(), state.speed.value());
m_driveEncoder.GetRate(), referenceState.speed.value());
// Calculate the turning motor output from the turning PID controller.
auto turnOutput = m_turningPIDController.Calculate(
units::radian_t{m_turningEncoder.GetDistance()}, state.angle.Radians());
units::radian_t{m_turningEncoder.GetDistance()},
referenceState.angle.Radians());
// Set the motor outputs.
m_driveMotor.Set(driveOutput);

2
wpilibcExamples/src/main/cpp/examples/SwerveControllerCommand/include/subsystems/SwerveModule.h
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@@ -27,7 +27,7 @@ class SwerveModule {
frc::SwerveModulePosition GetPosition();
void SetDesiredState(const frc::SwerveModuleState& state);
void SetDesiredState(frc::SwerveModuleState& state);
void ResetEncoders();